Who are we? We find that we live on an insignificant planet of a humdrum star lost in a galaxy tucked away in some forgotten corner of a universe in which there are far more galaxies than people

— Carl Sagan

Astronomy Cast

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Take a facts-based journey through the universe.
Updated: 3 hours 43 min ago

Ep. 718: Galaxy Series – Dwarf Galaxies

Mon, 05/06/2024 - 5:00pm

It’s time to begin a new mini-series, where we’ll look at different classes of galaxies. Today, we’ll start with the dwarf galaxies, which flock around larger galaxies like the Milky Way. Are they the building blocks for modern structures?

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Categories: Astronomy

Ep. 717: Understanding the Ages of Distant Cosmic Objects

Mon, 04/29/2024 - 5:00pm

How old is that star? That planet? That nebula? Figuring out the ages of astronomical objects is surprisingly challenging. Fortunately, astronomers have developed a series of techniques they can use to work out the ages of stuff.

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Categories: Astronomy

Ep. 716: The God**** Particle – Remembering Peter Higgs

Mon, 04/22/2024 - 5:00pm

Last week, we learned about the death of Peter Higgs, a physicist and discoverer of the particle that bears his name. The Large Hadron Collider was built to find and describe the particle. Today, we’ll look back at the life of Peter Higgs and his particle.

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Categories: Astronomy